My old toilets are set it very tightly. But when I replaced one I couldn't seem to tighten it enough. It rocks. The floor is linoleum, and I can see how the original toilet settled into the floor. Will the new one eventually settle in? Could the wax actually be lifting it up a little? Are there any tricks to setting the toilet in so it can't move? I'm afraid I'll crack the thing and regret not calling a professional in the first place.